Sofa



FIG. 1 is a front view of the design for a sofa;

FIG. 2 is a rear view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a left perspective view thereof;

FIG. 8 is a right perspective view thereof;

FIG. 9 is a left perspective view of the sofa in a slightly inclined position;

FIG. 10 is a right perspective view of the sofa in the slightly inclined position;

FIG. 11 is a left perspective view of the sofa in a moderately inclined position;

FIG. 12 is a right perspective view of the sofa in the moderately inclined position;

FIG. 13 is a left perspective view of the sofa in a highly inclined position;

FIG. 14 is a right perspective view of the sofa in the highly inclined position;

FIG. 15 is a left perspective view of the sofa in a fully inclined position; and,

FIG. 16 is a right perspective view of the sofa in the fully inclined position.

The broken lines shown in the drawings are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a sofa, as shown and described. 